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Retirement Planning Calculator
Enter expenses in today’s value. We interpret retirement and life expectancy as: retire at end of retirement age (first withdrawal at start of retirement age + 1), and live till end of life expectancy. During retirement, we assume withdraw first, then earn post-tax return on the remaining corpus.
⚙️ Inputs
Final Model
Post-tax Return in Retirement
—
Current Annual Expense
₹
—
How this model works (timing-aware):
1) If you enter retirement age R, we assume you retire at end of R and your first withdrawal is at start of (R+1).
2) We inflate your annual expense till the first withdrawal using inflation for (R − CurrentAge) years.
3) Required corpus at retirement is calculated as the NPV of yearly withdrawals at the start of (R+1), discounted at post-tax retirement return, with withdraw first → then return convention.
4) SIP is computed assuming you invest at the start of every month from the first month of age (CurrentAge+1) up to the last month of age R (i.e., (R − CurrentAge) × 12 deposits).
1) If you enter retirement age R, we assume you retire at end of R and your first withdrawal is at start of (R+1).
2) We inflate your annual expense till the first withdrawal using inflation for (R − CurrentAge) years.
3) Required corpus at retirement is calculated as the NPV of yearly withdrawals at the start of (R+1), discounted at post-tax retirement return, with withdraw first → then return convention.
4) SIP is computed assuming you invest at the start of every month from the first month of age (CurrentAge+1) up to the last month of age R (i.e., (R − CurrentAge) × 12 deposits).
📊 Results
Summary
⏳ Years to Retirement
Retire age − Current age
🧾 Years in Retirement
Life expectancy − Retire age
🚪 First Withdrawal Starts At Age
Start of (Retire age + 1)
📈 Annual Expense at First Withdrawal
₹
Inflation applied till start of (Retire+1)
💰 Post-tax Return in Retirement
%
Return × (1 − tax rate)
🏦 Existing Corpus Future Value @ Pre-ret Return
₹
Grows for (R − CurrentAge) years
💳 Monthly SIP Required
₹
Invested at start of each month
Corpus Required at Retirement (NPV of expenses): ₹
NPV is computed at the start of your first withdrawal year (Retire+1). Each year: withdraw first, then earn post-tax return on the remaining corpus.
📌 Corpus Funding Breakdown
At retirement
From existing corpus (FV)
₹ 0
Additional needed (via SIP)
₹ 0
Retirement Corpus Schedule
Withdraw first, then earn return on remaining corpus.
Withdraw first, then earn return on remaining corpus.
| Beginning Age | Corpus at Beginning | Exp/Withdrawal | Return (post-tax) | Corpus at End |
|---|
Schedule rules: Expense grows by inflation every year. Each year:
withdraw first, then return is earned at
post-tax retirement return on the remaining corpus.
Enter your details and click
Calculate to see results.
How Does This Retirement Calculator Work?
This calculator estimates your required retirement corpus using a cashflow approach with clear timing rules: you retire at the end of the retirement age you enter, and your first withdrawal happens at the start of the next age (Retire + 1). You also enter expenses in today’s value.
- Monthly Expense During Retirement (₹): What you plan to spend per month during retirement, in today’s value.
- Inflation (%): Increases expenses over time (till retirement and during retirement).
- Expected Return till Retirement (%): Used to grow your existing corpus and compute SIP required.
- Expected Return in Retirement (%): Reduced by tax to compute post-tax return.
- Capital Gains Tax Rate (%): Post-tax return = Return × (1 − tax).
- Corpus Required at Retirement: Calculated as the NPV of annual withdrawals at the start of (Retire+1), discounted using post-tax return.
- Amortization Table Convention: Each year: withdraw first, then earn return on what remains.
- SIP Timing: SIP is assumed at the start of each month from age (CurrentAge+1) till the end of retirement age.
Frequently Asked Questions
❓ Why is tax included in retirement return?
In retirement, investment gains may be taxed. To stay conservative, this calculator uses
post-tax return for corpus calculation and the schedule.
❓ Why do we use NPV instead of “Expense × Years”?
Because your money can continue earning returns during retirement. NPV discounts future expenses using your expected post-tax return, giving a more realistic corpus requirement.
❓ Why withdraw first and then earn return?
This matches a conservative and timing-correct approach: expenses are needed first (start of the year), and returns are earned on the remaining corpus.
Disclaimer: This tool is for informational purposes only and does not constitute financial advice. Mutual fund investments are subject to market risks.